Average Bench: 53.8% (850th of 1058)

more Based on 10,370 user benchmarks.  Models: C400-MTFDDAK256MAM, C400-MTFDDAC256MAM, MTFDDAK2 MTFDDAK256MAM-1K, Micron C400 RealSSD 2.5" 7mm 256GB, MTFDDAK256MAM-1K, Micron C400 RealSSD 2., MTFDDAK256MAM-1K1, MTFDDAK256MAM-1K12

Average average bench

The Micron C400 RealSSD 256GB averaged 46.2% lower than the peak scores attained by the group leaders. This isn't a great result which indicates that there are much faster alternatives on the comparison list.


Avg. 4K Random Write Speed 61.6MB/s
Avg. 4K Random Read Speed 18.1MB/s

Good consistency

The range of scores (95th - 5th percentile) for the Micron C400 RealSSD 256GB is 29.5%. This is a relatively narrow range which indicates that the Micron C400 RealSSD 256GB performs reasonably consistently under varying real world conditions.


Avg. 4K-64Thread Mixed IO Speed 23MB/s
Avg. Sustained Write Speed 173MB/s

Average Bench

(Based on 10,370 samples)
Min Avg Max
313 Read 384 434
49.5 Write 210 261
84.9 Mixed 224 259
47.8 SusWrite 173 256
55.1% 248 MB/s
Min Avg Max
10.8 4K Read 18.1 23
28.2 4K Write 61.6 98.2
9.3 4K Mixed 13.5 16.2
77.4% 31.1 MB/s
Min Avg Max
52.5 DQ Read 121 180
49.8 DQ Write 117 218
15.4 DQ Mixed 23 32
43.6% 87 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
112GB free (System drive)
Firmware: 0909
SusWrite @10s intervals: 197 188 189 177 177 161 MB/s
Read 423
Write 236
Mixed 240
SusWrite 181
60% 270 MB/s
4K Read 23
4K Write 89.4
4K Mixed 15.2
102% 42.5 MB/s
DQ Read 121
DQ Write 113
DQ Mixed 23.4
43% 85.8 MB/s
129GB free (System drive)
Firmware: 07TA
SusWrite @10s intervals: 203 151 193 205 202 140 MB/s
Read 368
Write 233
Mixed 256
SusWrite 182
58% 260 MB/s
4K Read 16.6
4K Write 45.2
4K Mixed 13.5
66% 25.1 MB/s
DQ Read 116
DQ Write 110
DQ Mixed 23.5
42% 83 MB/s
10,370 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 47,208,176 SSDs tested.

Typical C400 RealSSD 256GB Builds (Compare 7,545 builds) See popular component choices, score breakdowns and rankings.
Gaming 44%
Speed boat
Desktop 77%
Workstation 37%
Jet ski

System: HP Z420 Workstation

EDIT WITH CUSTOM PC BUILDER Value: 64% - Good Total price: $565

Popular C400 RealSSD 256GB systems:

How Fast Is Your SSD? (Bench your build) Size up your PC in less than a minute.

Welcome to our freeware PC speed test tool. UserBenchmark will test your PC and compare the results to other users with the same components. You can quickly size up your PC, identify hardware problems and explore the best upgrades.

UserBenchmark of the month

How it works

  • - Download and run UserBenchMark.
  • - CPU tests include: integer, floating and string.
  • - GPU tests include: six 3D game simulations.
  • - Drive tests include: read, write, sustained write and mixed IO.
  • - RAM tests include: single/multi core bandwidth and latency.
  • - SkillBench (space shooter) tests user input accuracy.
  • - Reports are generated and presented on userbenchmark.com.
  • - Identify the strongest components in your PC.
  • - See speed test results from other users.
  • - Compare your components to the current market leaders.
  • - Explore your best upgrade options with a virtual PC build.
  • - Compare your in-game FPS to other users with your hardware.
Solid State Drive Rankings (Price vs Performance) September 2021 SSD Rankings.

Welcome to our 2.5" and M.2 SSD comparison. We calculate effective speed for both SATA and NVMe drives based on real world performance then adjust by current prices per GB to yield a value for money rating. Our calculated values are checked against thousands of individual user ratings. The customizable table below combines these factors to bring you the definitive list of top SSDs. [SSDrivePro]


Group Test Results

  • Best user rated - User sentiment trumps benchmarks for this comparison.
  • Best value for money - Value for money is based on real world performance.
  • Fastest real world speed - Real World Speed measures performance for typical consumers.


1058 Drives (Compared) Thousands of user benchmarks compiled into one comparison list.

See how consistently different SSDs perform with varying real world conditions. The charts also illustrate overall performance, popularity and rank.

 Frequently Asked Questions

 Best User Rated

The Best.
Intel Core i5-11600K $270Nvidia RTX 3060-Ti $400Crucial MX500 250GB $45
Intel Core i5-11400F $260Nvidia RTX 3070 $500Samsung 860 Evo 250GB $52
Intel Core i7-11700K $380Nvidia GTX 1660S (Super) $240Samsung 850 Evo 120GB $183
Seagate Barracuda 1TB (2016) $40Corsair Vengeance LPX DDR4 3200 C16 2x8GB $74SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $35Corsair Vengeance LPX DDR4 3000 C15 2x8GB $77SanDisk Extreme 32GB $28
Seagate Barracuda 2TB (2016) $72G.SKILL Trident Z DDR4 3200 C14 4x16GB $649SanDisk Ultra Fit 32GB $16
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